My very first Pokemon, Midnight and Purrish. I played them in Pokemon Colosseum and I got them both to LV 100. I remember Purrish had a calm nature and Midnight a rash nature. I'll never forget 'em <3 (Espeon and Umbreon)
My Skitty/Delcatty from my first run of Mystery Dungeon, Angelpuss <3 <3 <3 <3
My current LV 65 Delcatty from Pokemon XD, Lavish. She's tougher on the battlefield than one might think, a good confuser/attractor.
My Luxray from the first run of Diamond. What the hell did I name him, I can't remember now... oh my gosh I really can't recall his name D: Anyways, I got him to like LV 98 but restarted the game.